I have had my lab cross retriver pup for around 6 weeks now and he is an absolute hand full. He is been trained too work atm and he is doing really well. I dont know if anyone has mentioned it but a create of some form is definatly needed. The pup will cry and cry for the first few days but after that they will be fine. Mine goes in on his own accord now. They are good when the house is empty it stops them chewing things. I can vouch for how greedy they are. Make sure you mesure its food from day one as labs have a tendancy too get fat quickly. Mine doesnt have that problem as hes out 3 days a week all day. They are very very loving but make sure your firm from day one.
Any questions just shoot me a PM